involving the flipping of one of three coins. Assume that you have two fair coins and an unfair coin with Pr[H] = [ 2/5]. You randomly select one of these coins, and flip it twice. A random variable X is defined to be the number of heads you observe.
How many different values are possible for the random variable X?
i got 3
Fill in the table below to complete the probability density function. Be certain to list the values of X in ascending order.
Value of XProbability
0
1
2
how do u get probability
Fill in the table below to complete the probability density function. Be certain to list the values of X in ascending order.
2006-10-11 06:42:26 · 2 answers · asked by Diggler AKA The Cab Driver 1 in Science & Mathematics ➔ Mathematics
I agree with the 3 values of X. To get the probabilities, figure the different ways to get each value of X, and the probability of each one. For example, to get 0 heads, you can choose each coin and each flips both tails. 2/3 of the time it is the fair coin so when that is true it is 1/4 probability to get both heads, agree? Just continue along those lines. Maybe review the conditional probability formula.
2006-10-11 06:58:37 · answer #1 · answered by An electrical engineer 5 · 0⤊ 0⤋
stop cheating on your homework
2006-10-11 13:43:22 · answer #2 · answered by N T 2 · 0⤊ 1⤋